SEA LIFE Sydney Aquarium is open daily from 10am to 5pm, including weekends and public holidays.
Recommended duration: It takes about 1.5 to 2 hours to explore the entire aquarium. Your ticket has a flexible validity, so feel free to spend as long as you like inside.
Best time to visit the aquarium
Since the aquarium is indoors, you can visit any time of year without worrying about the weather. Tourist season in Australia is from December through February, so you may find it busier than usual at the aquarium and other attractions. If you want to avoid the crowds but still experience some of that good weather, consider visiting in November or March.
Mondays through Fridays are comparatively less crowded than weekends, so if you have the option to visit on a weekday, go for it!